Her message was clear.

In a recent installment of ESPN’s “Get Up,” Mike Greenberg, who hosts the daily morning show, was featured on-air sporting a grey mustache — which clearly wasn’t approved by his wife Stacey.

“Definitely not,” Stacey wrote on Twitter, including a photo of her husband looking somber with a salt and pepper upper lip.

Greenberg reposted his wife’s tweet and wrote: “If this is what it takes, I will do it.”

It’s unclear what exactly the ESPN personality was referring to in his reply.

The photo of Greenberg with a mustache appeared to be old, as Greenberg — now with a bearded look — and the analysts on “Get Up” were seen reacting to the photo during a live show.

It’s possible Greenberg, who’s a diehard Jets fans, was discussing something that involved his new favorite quarterback, Aaron Rodgers.

Stacey is hysterical on Twitter, and often shares a glimpse into the couple’s home life in New York City.

She hilariously documented in March how Greenberg was “on edge” as he awaited the news of Rodgers’ decision about his playing future. 

The four-time NFL MVP was traded to the Jets in April, following 18 seasons in Green Bay.

Rodgers, 39, is set make his debut with the Gang Green in Saturday’s preseason finale against the Giants at MetLife Stadium, as reported by The Post’s Brian Costello.

He sat out the first three preseason games while the Jets started backup quarterback Zach Wilson. 

Stacey also provided updates on Greenberg’s health when he was absent from “Get Up” following a heart procedure in March.

Greenberg and his wife, who is a columnist and author, celebrated their 26th wedding anniversary in September.